- In the interrogative form, putting the verb before the subject or vece versa after, is the same thing. Then you can also say:
____Tu sei?/Lei è?
- You have to know that (in general for all the verb conjugations) you can often omit the subject, for example instead of saying "io sono" you can just say "sono", instead of saying "noi siamo" you can just say "siamo", instead of saying "siete voi?" you can just say "siete?" and so on. This can be done, because the form itself of the verb identifies the subject.
Also, see the present tense of "essere" "to be": negative-interrogative form
and the present tense of "avere" "to have": interrogative form
For now that's all, see you at the next litle lesson.